The correct answer would be option A, Hydro Cooling.
In order to take away the heat and increase the shelf life of his freshly produced lettuce and sweet corns, Richard uses ice cold water to wash to vegetables immediately after harvest. Richard is using Hydro Cooling technique of preservation of food.
Explanation:
When vegetables or fruits are washed away with cold freezing water right after they are harvested, in order to prevent them from ripening, then this process is called as the Hydro Cooling.
Hydro Cooling is usually used where there is a fear of ripening of food quickly, or the food is to be transported to the markets or customers after some period of time.
Vegetable like Lettuce which has a very short life after harvest, is usually kept fresh through this process of Hydro Cooling.
Learn more about Keeping food fresh at:
brainly.com/question/11115603
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